Episode 13:A Fight Against Gravity... Catch Bubbles!

In this episode Goku can not start his training until he makes King Kai laugh. Then he must catch King Kai's monkey Bubbles. Now this may sound easy but not in 10 times earths normal gravity! Kinng Kai tells Goku that the saiyans homeworld planet Vegeta had the same gravity as his place. He also tells him that the two saiyans coming to earth are stronger than King Kai himself. This makes Goku want to train even harder.